Evaporator



C. H. SMITH Jan. 31, 1933.

EVAPORATOR 5 Sheets-Sheet Filed March 2, 1931 INVENZOR 6444/ \/V- W -7"M ,4). V a r ATTORNE Jan. 31, 1933. c, SMITH 1,895,587

EVAPORATOR Filed March 2. 1931 3 Sheets-Sheet 2 A TTORNE y Jan. 31, 1933. sMlTH 1,895,587

' EVAPORATOR Filed March 2, 1931 3 Sheets-Sheet 5 \N I: II. II. |l||| ATTORNEY Patented Jan. 31, 1933 UNITED STATES PATENT OFFICE CHARLES E. SMITH, OEGBEENVILLE, MICHIGAN, ASSIGNOR TO GIBSON BEFRIGERATdR comm, OF GREENVILLE, MICHIGAN, A CORPORATION OF MICHIGAN EVAPOBATOR Application filed March 2,

This invention relates to refrigerator evaporator units and more particularly to units including a shaped coil of copper tubing, a plurality of plates, and supporting elements. An object of this invention is a novel form of unit including a plurality of apertured plates having rearwardly extending portions which form an interior lining for the coil and which may be lapped to form a plate assembly. If desired, the bottom lining may be ridged to space the tray resting thereon from the lining. Further, the upper edges of the plates may be notched to permit a cross over connection being runfrom one loop to the next, as desired.

Further objects will readily occur to those skilled in the art upon reference to the following description and the accompanying drawings in which 1 is a front View of the evaporator.

Fig. 2 is a perspective diagrammatic view of the plate assembly.

Fig. 3 is a to plan view of the evaporator.

Fig. 4 is a side view of the evaporator.

Referring to the drawings, it will be seen that the evaporator includes a plurality of sheet metal plates, a shaped 0011 of copper tubing, and supporting elements. 7

The plates The plate assembly includes a front plate '10, intermediate plates 12, and a back plate portions 18 and 20 of the rearwardmost of the intermediate plates are bent towards each other, as at 22, to form lugs to which may be securely attached the back plate 14, that the plates ma be considered as forming a unitary assem ly.

Auxiliary plate assembly parts include a pair of channels 24, and a pair of straps 26, all of which connect the plates and extend from the front plate 10 to the rear plate 14. The channels 24 form rails upon which the 1931. Serial No. 519,377.

edges of the ice tray 28 may slide and be supported, and the overlapping portions 20 are ridged at 30 to form supports upon which the ice tray 32 may slide and be supported,

out of contact with the major part ofthe the coil from one loop to the next adjacent loop, and in this fashion the upper surface v of the coil is disposed below the upper edges of the plates.

The coil The coil 40 is formed of a continuous length of copper tubing, shaped to form substantially rectangular loops 42 which surround the portions 18 and 20 of the plates, the loops being connected to one another by the cross over loop portions which run from -the upper left part of a front loop to the upper right part of the next rearward loop,

some of the cross overs being thru the notches 34 in the intermediate plates. As indicated, there are three loops between each pair of plates, although this number inay be varied as desired. For example, there might well be only one loop between each pair of plates, the plates being,,in any case, in the spaces between adjacent loops. A

The coil inlet 46 leading from the expansion valve rises and runs over the top of the loops to the upper right part of the forwardmost loop, and the coil outlet 48, runs over the top of the loops from the upper left part of the rearwardmost loop, to the suction side of the compressor, not indicated, a p

The loops aresoldered to the plates-at their contacting surfaces, and the interior of the loops areprotected from the trays, by the lapping portions 18 and 20 which form a continuous lining for the coil, and by the channels 24 and the straps 26. Further, the loops are within the edges of the plates so that the latter protect the outside of the coil as well.

While the coil has been disclosed and described as a continuous coil of tubing, it might .well be made of a plurality of U tubes connected by headers,

or by to resemble tubes,

The coil and plate assembly,

pass thru in the wings 52 and soldered to the upper loops. Further, the coil strengthened by means of U sheets, grooved and connected by headers.

The supports as a unit may der surface of a a cabinet by means of the apertures 50 of the U straps or brackets 54 disposed under the horizontal run of the inlet 46 and outlet 48 of the parts coil parts of the coil support may be bolts- 56 connecting straps 58 under the loops with angles 60 secured or soldered to the s 54, as indicated.

vided and the latter traps or brackets expansion valve support may be promay include an angle 62 soldered orotherwise secured to the back plate 14.

It will be seen that there has been provided protected inside and an evaporator unit comprising a continuous on the inside and out by plates, etc., and

having suitable supporting means.

Now having described the invention and the 0 understood that the limited, not to the forth, but only by which follow.

What I claim is: L

preferred embodiment thereof, it is to be said invention is to be specific details herein set the scope of the claims An evaporator unit comprising a coil of tubing having an inlet and outlet, and a plurality of sheet metal plates disposed be- ,Mtween and secured to spaced certain of the next hindmost be secured to one another to loops of the coil,

plates having rearwardly extending portions engaging portions of the plate whereby the plates may form an integral unit, the rearwardly extending portions being lnside the coil.

2. An evaporator unit comprising a coil of tubing having an inlet a plurality of s eet metal and outlet, and plates disposed between and secured to spaced loops of the coil, certain of the extendin portions next hin be secured to one another to unit, the rearwardly extending portions inside the 5 smooth interior plates having rearwardly engaging portions of the 0st plate whereby the plates may form an integral being coil, and overlappin to form a ining wall for t e coll upon which can rest an article to be refrigerated.

3. An evaporator unit comprising a coil of tubing having an inlet and outlet, and a plurality of sheet metal plates disposed between and secured to certain of the tending portions engagin next hindmost plate where be secured to one another to 65 unit, the rearwardly ext spaced loops-of the coil,

plates having rearwardly exportions of the y the plates may form-an inte al ending portions plurality of secured to spaced loops of the coil certainof the plates having notches in thelr edges to permit the tubing to cross the plates from one loop to the next, certain of the plates having rearwardly -extending por; tions engaging portions of the nextrhindmost plate whereby the plates may be secured to one another to form an integral unit.

5. An evaporator unit comprising a coil of tubing having an inlet and outlet, and a plurality of sheet metal plates disposed between and secured to spaced loops of the coil, certain of the plates having notches intheir edges to permitthe tubing to cross the plates from one loop to the next, certain of the plates having rearwardly extending portions engaging similar portions of the next hindmost plate whereby to one another to form an integral unit. I 6. An evaporator. unit comprising a coil of tubing having an inlet and outlet, and. a sheet metal platesdisposed between and secured to spaced loops of the coil, certain of the plates having notches in their edges to permit the tubing to cross the plates from one loop to the next, certain of the plates having rearwardly extending portions engaging portions of the next hindmost plate whereby the plates may be, secured to one another to form an integral unit, the rearwardly extending portions being inside the coil.

7; An evaporator unit comprising a coil of tubing having an inlet and outlet, and a plurality of sheet metal plates disposed be tween and secured to spaced loops of the coil, certain of the plates having notchesin their the plates may be secured edges to permit the tubing to cross the plates from one loop to the next certain of the plates having rearwardly extending portions engaging portions of the next hindmost plate wardly extending portions being inside the coil and -ov.erlapping to form a smooth interior lining wall for the coil upon which can rest an article to be refrigerated.

8. An evaporator unit comprising a coil of tubing having an inlet and outlet, and a plurality of sheet metal plates disposed between and secured to spaced loops of the coil, certain of the plates having notches in their edges to permit the tubing to cross the plates from one loop to the next, certain of the plates having rearwardly extending portions engaging portions of the nexthindmost plate whereby the plates may be secured to one another to form an integral unit, the rearwardly extending portions being inside the coil and overlapping to form a smooth interior lining wall for the coil upon which can rest an article to be refrigerated, and having spaced ridges thereon for purposes described.

9. An evaporator unit comprising a coil of tubing having an inlet and outlet, and a plurality of sheet metal plates disposed between and secured to spaced loops of the coil, certain of the plates having rearwardly extending portions engaging portions of the next hindmost plate whereby the plates may be secured to one another to form an integral unit, the rearwardly extending portions being inside the coil, and overlapping to form a smooth interior lining wall for the coil upon which can rest an article to be refrigerated, and having spaced ridges thereon for purposes described.

10. An evaporator unit comprising a coil of tubing having an inlet and an outlet, and I a plurality of sheet metal plates disposed between spaced loops of the coil, certain of the plates having rearwardly extending por tions inside the coil, said portions extending to and coacting with corresponding portions on the next adjacent plate to form a function ally continuous wall.

11. An evaporator unit comprising a coil of tubing having an inlet and outlet, and a plurality of sheet metal plates disposed between spaced loops of the coil, certain of the plates having rearwardly extending portions engaging portions of the next hindmost plate whereby the plates may be secured to one another to form an integral unit, the rearwardly extending portions being inside the coil.

In testimony whereof, I sign this specification.

CHAS. H. SMITH. 

